package main

import "fmt"

type aStruct struct {
	s string
}
func main() {
	var i int//0
	var f float64//0
	var b bool //false
	var s string //""
	var a aStruct //{} MARK 这里是空对象nil 不会空指针

	fmt.Printf("%v %v %v %q %v \n", i, f, b, s,a)
}
